Sound synchronized slide projector



Sept. 1, 1970 M. E. GERRY SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May28, 1968 10 Sheets-Sheet l INVENTOR.

Sept. 1, 1970 M. E. GERRY SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May28, 1968 I NVENTOR.

Immim M.' E.. GERRY 3,526,454

Sept 1, 1910 scum) SYNCHRONIZED sunk PROJECTOR 10 Sheets-Sheet 5 FiledMay 28. 1968 INVENTOR.

l 1970 M. E. GERRY 3,526,454

SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May 28, 1968 10 Sheets-Sheet 4I NVE NTOR.

Sept. 1, 1970 GERRY 3,526,454

SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May 28, 1968 10 Sheets-Sheet 5I NVEN TOR.

Sept. 1, 1970 GERRY 3,526,454

SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May 28, 1968 10 Sheets-Sheet 6INVENTOR.

M. E. GERRY Sept. 1, 1970 SOUND SYNCHRONIZED SLIDE PROJECTOR l0Sheets-Sheet 7 Filed May 28, 1968 INVENTOR.

Sept. 1, 1970 M. E. GERRY SOUND SYNCHRONIZED SLIDE PROJECTOR 1oShets-Sheet 8 Filed May 28. 1968 Sept. 1, 1970 GERRY 3,526,454

- SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May 28, 1968 10 Sheets-Sheet9 INVENTOR.

Se t], 1910 M. E- GERRY 3,526,454

SOUND SYNCHRONIZED SLIDE PROJECTOR Filed May 28, 1968 I 10 Sheets-Sheet1o PUSH BUT TO N I IHEAD PETRAC T5 L/F T 5 TA Y5 SLIDE LIFT 'L/F'T jIL/FTED i I RISES I l DRUM ROTATE I I% Z I I l HEAD I I I I RE TURNSSLIDE DROP I I I I LII-T I I Im s I 252222 I I I HOTOR ACTUf-ITE -5CAN II I START I I I I END I INJECT I I I c CLE 5 c A N I I I I 4) DEGREESMOTOR 125 Rev-A T/ON INVENTOR.

United States Patent 3,526,454 SOUND SYNCHRONIZED SLIDE PROJECTOR MartinE. Gerry, F179 Devon Stratford Apartments, Devon, Pa. 19333Continuation-impart of application Ser. No. 528,707, Feb. 21, 1966. Thisapplication May 28, 1968, Ser. No. 736,542

Int. Cl. G03b 31/06 US. Cl. 35319 Claims ABSTRACT OF THE DISCLOSURE Aslide projector that optically projects any of a number of slidescontaining visual information retained in compartments of a slidemagazine. The slides are automatically transferred from the slidemagazine and positioned one slide at a time with respect to an opticalsystem of the projector for projecting the visual information on theslides and subsequently returning the slides to their respectivecompartments in the slide magazine. The projector has sequencingcapability for providing proper positioning of the slide magazine foreffecting slide transfer and return. An individual audio informationrecord is secured to each of the slides. A sound track scanner providesa generally zig-zag sound track on a surface of the audio informationrecord and a recordreproduce head is secured to the sound track scannerfor recording sound along the sound track or for reproducing the soundfrom the sound track.

CROSS REFERENCE TO COPENDING APPLICATION This application is acontinuation-in-part application of copending application Ser. No.528,707, filed Feb. 21, 1966 by the same inventive entity, nowabandoned.

SUMMARY OF INVENTION The present invention relates to an improvedprojector for optically projecting visual information from a stationaryslide and simultaneously recording or reproducing sound from a soundtrack. A particular advantage of this invention is that it includes avery simple mechanical scanner for recording or reproducing the soundtrack. Another advantage of this invention is the use of a novel andinexpensive drum or disk for storing and retrieving the visualinformation and for recording or reproducing the sound therefrom orcontained therein. Still another advantage of this invention is theprovision for automatically and simply controlling the injection ofvisual and sound information, for programming the said visual and soundinformation for automatic sequential retrieval, and for automaticallystarting and stopping the slide arrangement at exactly the same slideposition and at the same record-reproduce surface initial location ofthe record-reproduce head assembly. Briefly, in accordance with thepresent invention, a sound synchronized slide projector includes a soundrecording and reproducing system comprising a drum or a disk into whicha plural number of slides or a film strip with a plural number of framesis inserted, and a segment of the drum or disk as sociated with aparticular slide or frame of a film strip has as an integral partthereof a sound track, or in the case of the spoke-wheel drum, the slideand sound track means wherein the slide is part of the sound trackmeans, is inserted in the compartment of this drum, a 14 inch diameterdrum being capable of about 100 compartments. Sound is recorded orreproduced by means of a simple mechanical sound track scanner which hasas an integral part thereof a record-reproduce head assembly, whichstarts from a particular location on the sound track sur- 3,526,454Patented Sept. 1, 1970 ice face, scans the sound track surface and thenreturns the record-reproduce head assembly to its exact startinglocation on the record-reproduce sound track surface automatically, anda control circuit stops the scan mechanism automatically. If theautomatic programming switch is in the ON position, the next slide andassociated sound track will be placed in position automatically, and thescanning mechanism will again scan and thereby record or reproduce thesound track associated with that particular slide, until all successiveslides and associated sound tracks in said drum or disk will have beenexhausted and the automatic control mechanism will have shut off theprogrammer, enabling a new drum or disk to be inserted in the projector.If the automatic programmer switch is off, single slide control andassociated single sound track control is possible by means of a pushbutton, manually operated after each scan termination of each slide andassociated sound track.

DRAWINGS A more thorough understanding of the invention may be obtainedby a study of the following detailed description taken in conjunctionwith the accompany drawings in which:

FIG. 1 is a perspective view partially in cross-section of the soundsynchronized slide projector constructed in accordance with thisinvention;

FIG. 2 is a top view partially in cross-section of the soundsynchronized slide projector showing details of the injection controlmeans and the optical system;

FIG. 3 is a sectional view taken on line 3-3 of FIG. 2 showing inelevation certain scanner details;

FIG. 4 is a perspective view partially in cross-section of a segment ofthe sound and slide retainer drum showing the manner in which mountedslides are inserted into the slide retention windows;

FIG. 5 is a perspective view partially in cross-section of a segment ofthe sound and slide retainer drum showing insertion and retention of afilm strip in the film strip retention frame and windows;

FIG. 6a is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism at the initialor start location of the recordreproduce head assembly and the locationof the recordreproduce head at point 97 a of the record-reproduce soundtrack;

FIG. 6b is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after 30 degreesof rotation of the sound track scanner control cam has occurred and therecordreproduce head is positioned at point 97b on the recordreproducesound track;

FIG. 6c is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after 60 degreesof rotation of the sound track scanner control cam has occurred and therecordreproduce head is positioned at point 970 on the recordreproducesound track;

FIG. 6d is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after degrees ofrotation of the sound track scanner control cam has occurred and therecordreproduce head is positioned at point 97d on the recordreproducesound track;

FIG. 6e is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after degrees ofrotation of the sound track scanner control cam has occurred and therecordreproduce head is positioned at point 97e on the recordreproducesound track;

FIG. 6 is an elevation view of the scanner mechanism showing therelative position of the moving parts of this 3 mechanism after 240degrees of rotation of the sound track scanner control cam has occurredand the record-reproduce head is positioned at point 97] on therecord-reproduce sound track;

FIG. 6g is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after 300degrees of rotation of the sound track scanner control cam has occurredand the recordreproduce head is positioned at point 97g on therecordreproduce sound track;

FIG. 6h is an elevation view of the scanner mechanism showing therelative position of the moving parts of this mechanism after 355degrees of rotation of the sound track scanner control cam has occurredand the recordreproduce head is positioned at point 9711 on therecordreproduce sound track. This figure also shows the path taken bythe record-reproduce head during the final degrees of scanner controlcam rotation in order to automatically return the record-reproduce headassembly to its initial or start location thereby returning therecord-reproduce head to point 97a on the record-reproduce sound track;

FIG. 7 is a schematic diagram showing the control system circuitry andthe record-reproduce electronic circuit of one of the configurations;

FIG. 8 is a perspective view partially in cross-section of a sound andslide drum and a portion of the sound track scanner mechanism;

FIG. 9 is a perspective view of a combination sound and slide disk, aportion of the sound track scanner mechanism partially in cross-section,and the associated slide projection lens and lamp assembly;

FIG. 10 is a perspective view of another configuration of this inventionfor utilizing a spoke-wheel type of drum containing a plural number ofcombination sound and slide plates;

FIG. 11 is a perspective view partially in cross-section of an elevatormechanism used to transfer slide plates from the spoke-wheel drum to theprojector and back to the drum, and also showing the way the slide plateis held in the projector during recording or reproducing of soundaccompanying the projection of visual information from the slideintegral with the slide means;

FIG. 12 is a bottom plan view of the spoke-wheel drum;

FIG. 13 is a perspective view partially in cross-section taken alongline 13-13 of FIG. 12 and showing one-half of the spoke-wheel type drum;

FIG. 14 is a schematic diagram showing the control system circuitryparticularly as it pertains to the spoke-wheel type drum projector, aswell as the record-reproduce electronics; and

FIG. 15 is a timing diagram of the functions occurring after initiationof the slide injection cycle and prior to the sound scanning operation.

STRUCTURAL RELATIONSHIPS Referring to FIGS. 1, 2, 3, 4, 5, 8 and 9,brackets 3, 7, and 56 are mechanically affixed to main chassis 1 bymeans of screwsI Optical projection lens assembly 2 is mechanicallyaifixed to mounting bracket 3. Slide selec tion drive motor 35,automatic programming actuator microswitch 26, control scanner motorstop microswitch 31, and record-reproduce head assembly retract solenoid49, are all mechanically afiixed by means of bolts to main chassis 1.Light source 65, optics lens or projector lamp assembly 112, solenoidbracket 111, injection cycle microswitch 41, start relay enablemicroswitch 45, program termination microswitch 101, solenoiddeenergizer microswitch 121, actuated gear shaft retainer brackets 5 and25, and sliding bar retainer pivot mounting bracket 118, are allmechanically affixed by means of bolts to main chassis 1.

The sound track sensor is comprised of motor 6, shaft 8, gear 9, gear10, cam 23, shaft 11, brackets 25 and 5, follower roller 16, slide barretainer 15, sliding bar 14,

head assembly 17, pitman arms 12 and 13, spring 54, bolt 55, bracket 56,pivot pin 18, spring 19, and pivot pins 20, 21, and 22.

Sound track scanner drive motor 6 is mechanically afiixed by means ofbolts to bracket 7 thus raising motor 6 to the required height to enablethe coupling and cooperation of the teeth of actuator gear 9, which ismounted on shaft 8 of motor 6, with the teeth of actuated gear 10. Thediameter ratio of gear 10 to gear 9 is 3 to 1, thereby causing threecomplete revolutions of gear 9 in order to revolve gear 10 once. Gear10', sound track scanner control cam 23, and scan cycle timing cam 24are all mechanically mounted on actuated gear shaft 11. Shaft 11 issuspended and mechanically held in an aperture in bracket 25 on one end,the other end being suspended in an aperture of bracket 5. Sliding barretainer 15 has a follower roller 16 mechanically affixed to saidretainer 15, and said roller 16 cooperates with the edge of cam 23. Atthe normally inoperative state of the sound track scanner, the highestportion of cam 23 cooperates with roller 16. Bracket 56 mechanicallyretains tension spring guide bolt 55 which extends through the axis offollower tension spring 54. Spring 54 cooperates with the side ofsliding bar retainer 15 and applies pressure constantly against saidsliding bar retainer 15 causing said sliding bar retainer 15 to holdfollower roller 16 in cooperative relationship to the edge of cam 23during rotation of cam 23, and also when cam 23 is at a standstill.Sliding bar 14 is inserted in and guided by sliding bar retainer 15,always cooperating in a sliding engagement with the inner surfaces ofsliding bar retainer 15 when cam 23 is automatically rotated about theaxis of shaft 11 by said shaft 11. Sliding bar retainer 15 has a lipwith a hole through which sliding bar retainer pivot pin 22 is inserted,said pivot pin 22 being also inserted in a hole in bracket 118 and heldthereby, so that the entire assembly retained and held by said slidingbar retainer 15 may be pivoted about the axis of pivot pin 22 when cam23 is automatically rotated. Sliding bar 14 is mechanically attached bymeans of a pivot pin 18 to record-reproduce head assembly 17. Said headassembly 17 has as an integral part thereof record-reproduce head 64,which in the normal or pre-operative position the said assembly 17 isretracted by solenoid 49 which is normally electrically energized, andsolenoid armature 50 normally is retracted into the coil of saidsolenoid 49 thereby retracting armature extension 51 which cooperateswith record-reproduce assembly 17, thereby preventing head 64 fromresting on magnetically coated recording surface 53 of drum 4, orpreventing cooperation of recording head 64 with magnetically coatedoxide upper surface of drum 109 containing ventilation holes 39, saidupper surface of drum 109 being orthogonal to the planes of the windows52a through 52:, or preventing cooperation of recording head 64 with theunder or lower surface of sound and slide retainer disk 106 which has amagnetically coated recording undersurface, located adjacent to each ofthe inner edges of windows 52a through 5521 of disk 106 circumjacentshaft 36. Record-reproduce head assembly tension spring 19 exertspressure on assembly 17 to hold head 64 in cooperative relationship withrecording surface of disk 106.

Pitman actuator arm 12 and gear 9 are mechanically affixed to shaft 8 ofmotor 6 and are rotated simultaneously when said shaft 8 is rotated bymotor 6. Pitman actuated arm 13, gear 10, cam 23, and cam 24 aremechanically aflixed to shaft 11 and are rotated simultaneously by shaft11 due to cooperative engagement of the teeth of gear 9 with the teethof gear 10, when said gear 9 is rotated by shaft 8 which is driven bymotor 6. Pitman actuator arm 12 is mechanically attached to pitmanactuated arm 13 by means of pivot pin 20, the other side of pitmanactuated arm 13 being mechanically held to sliding bar 14 by means ofpivot pin 21. Therefore, pitman actuator arm 12 is rotatable by shaft 8of motor 6 and pivotable about the axis of pivot pin 20, and pitmanactuated arm 13 is pivoted about the axis of pivot pin 20 on one side,and about the axis of pivot pin 21 on the other side, when themechanical sound track scanner is driven by said motor 6, said motor 6rotating in a clockwise direction. The sliding bar retainer 15 ispivoted about sliding bar retainer pivot pin 22; pivot pin 22 and lip ofsliding bar retainer 15 are both mechanically aflixed to bracket 118,thereby permitting a limited degree of pivoting action of sliding barretainer 15 and the components attached thereto, about the axis of pivotpin 22 when cam 23 is automatically rotated counterclockwise, beingdriven by gear which is mechanically coupled to driving gear 9, theteeth of gear 9 and gear 10 engaged in mechanical cooperation with eachother. Follower roller 16 being mechanically attached to sliding bar ispressed against the edge of cam 23 by action of spring 54, therebyinsuring that sliding bar retainer 15 constantly follows the contour ofcam 23 when said earn 23 is automatically driven as aforementioned. Whenmotor 6 is electrically energized, gear 9 and pitman actuator arm 12will describe a clockwise rotation moving pitman arm 13 which willassume the several angular positions as described by FIGS. 64: through611, and sliding bar 14 will generally move in a reciprocating motion inthe directions described by direction arrow 117. Recordreproduce headassembly 17 will exactly follow motion of sliding bar 14. The variousangular positions of cam 23 and gear 10 as compared with the angularrotation of gear 9 will be hereinafter discussed in detail. Followerroller 28 mechanically aflixed to movable contactor 27 of microswitch 26cooperates with the edge of cam 24 and is normally positioned on the lowportion of said cam 24, and follower roller 33 mechanically aflixed tomovable contactor 32 of microswitch 31, cooperates with the edge of cam24 and is normally positioned on the high portion of cam 24, so thatwhen said cam 24 is automatically rotated due to the counterclockwiserotation of gear 10 driven by gear 9, cam 24 is also rotated in acounterclockwise direction so that follower roller 33 following cam 24contour, almost immediately is positioned at the low portion of cam 24,but follower roller 28 remains on the low portion of cam 24 until 355degrees of cam 24 rotation is completed, corresponding to 355 degrees ofcam 23 counterclockwise rotation Motor 35 has driveshaft 36 which isflattened on one edge to provide a keyed shaft for properly positioningor loading into the projector at the correct azimuth angle either a drumor a disk having a plural number of sound tracks associated with aplural number of slides or film strip frames, each sound track having acorresponding slide mounted in permanent relationship to each respectivesound track. Shaft 36 has mechanically mounted thereon and afiixedthereto injection control cam 40 together with extension arm 99 which ismechanically affixed to cam 40 by means of retainer screw 100, andextension arm 119 which is mechanically aflixed to cam 40 by means ofretainer screw 120. Shaft 36 has mounted directly above cam 40, drum ordisk seat bushing 37 on which is seated drum sleeve 38 when drum 4 or acorresponding sleeve to drum sleeve 38 when drum 109 is used, or disk106 is seated on bushing 37, shaft 36 extending through a hole at thecenter of disk 106, when said disk 106 is used. When either drum 4 ordrum 109 is used, shaft 36 is inserted through keyed sleeve 38 locatedat the center of either drum. It should be emphasized that three basicconfigurations of combination sound track and slide are illustratedrespectively in FIGS. 1, 8 and 9. However, for the drum configurationsit is possible to have slide inserts as illustrated in FIG. 4 or acontinuous film strip as illustrated in FIG. 5. Under normal orpreoperative mode conditions, cam 40 cooperates at its high portion withfollower 43 mechanically afiixed to movable contactor 42 of injectioncycle microswitch 41, with follower 47 mechanically aflixed to movablecontactor 46 of start relay microswitch 45, with follower 103mechanically affixed to movable contactor 102 of program terminationmicroswitch 101, and with follower 124 mechanically afiixed to movablecontactor 122 of microswitch 121, are affixed to cam 40, so that whencam 40 is automatically rotated clockwise by shaft 36 of motor 35,follower 43 following the contour of cam 40 moves off the high portionof said cam 40 to the low portion of said cam 40 to start the slideselection drive motor 35, said motor 35 remaining electrically energizeduntil 18 degrees of drum or disk segment rotation has occurredcorresponding to one-twentieth of 360 degrees of rotation, orcorresponding to one slide window dimension for each of the 20 slidesarranged in the disk or drum. The follower 43 will remain on the lowportion of cam 40 until the next high portion of said cam 40 cooperateswith follower 43 after 18 degrees of cam 40 rotation, at which timemotor 35 will be automatically deenergized and stopped. Cam 40 has ahigh portion every 18 degrees for a total of 20 high portions, one highportion corresponding to each slide positioned in the 20 windows 52athrough 52t, of either of the drums or of the disk. Cam 40 has 20 lowportions, each low portion alternating with each high portion of saidcam 40'. P01- lower 47 under these circumstances will be positioned fromthe first low portion of cam 40' to the second high portion of cam 40and thereby causes control relay 66 to be electrically enabled andoperated, and then follower 47 will come to rest on the second lowportion of cam 40 at the conclusion of injection of the first slide andcorresponding sound track. Follower 103 cooperating With extension arm99 will also under these circumstances move in a clockwise direction ascam 40 is rotated, causing said follower roller 103 to cease tocooperate with extension arm 99, said action of roller 103 and arm 99will cause program termination microswitch 101 to be operated so thatmicroswitch contactors 102 and 104 cooperate with each other, remainingin said cooperative relationship until all 20 slides have beencompletely programmed, and cam 40 and extension arm 99 returned to thenormal positions as shown in FIGS. 1, 2, and 7. Likewise follower roller124 cooperating with extension arm 119 will also under thesecircumstances move in a clockwise direction as cam 40 is rotated,causing said roller 124 to cease to cooperate with extension arm 119,said action or roller 124 and extension arm 119 will cause solenoiddeenergizer microswitch 121 to be operated so that microswitchcontactors 122 and 123 cease to cooperate with each other, remaining ina non-cooperative relationship until all 20 slides have been completelyprogrammed and cam 40 and extension arm 119 is returned to the normalposition as shown in FIGS. 1, 2, and 7. It should be noted that the useof the words follower, roller, or follower roller are interchangeable intheir usage herein.

When sound and slide retainer drum 4 is utilized in one configuration,mounted slides 57 are inserted into each of the twenty slide retentionwindows 52a through 52t, through slide insert apertures 58 and are heldby ridges 59 in said windows 52a through 52t. Each of the 20 surfaces 53are coated with a. magnetic oxide material for recording a magneticsound track 97 thereon and for reproducing said magnetic sound track 97therefrom. When a continuous film strip 60 is used in anotherconfiguration (FIG. 5) in lieu of the mounted slides 57, the magneticsound track is identical to that of the configuration wherein themounted slides are used, but the film strip 60 is inserted in ridges 59forming substantially a complete circle of photographic frames, each ofwhich is located in the center windows 52a through 52!. Cutaway sectionsare provided at the juncture of window frames 52a and 52t correspondingto the meeting of the ends of the film strip 60, and the two 7 adjacentframes of windows 52a and 52! abutting each other, are slightlyseparated from each other (not molded to each other) at film retainerslot 61 in order that the ends of the film may be forced into and heldby said slot 61. Cutaway section 62 shows the ends 63 of film 60retained in film retainer slot 61. When either of the aforementionedconfigurations of drum 4 is used, light source assembly 65 is used toilluminate either the mounted slide or the film strip, since said lightsource 65 is located directly behind windows 52a through 521 when saiddrum 4 is successively positioned for projection of the slides retainedtherein. When any particular window is programmed for projection, thelight source illuminates the image on the slide and said image isprojected through optical assembly 2. Drum ventilation holes 39 are usedin drum 4 for expulsion of heat generated by the projection lamp.

When sound and slide retainer drum 109 is used in conjunction withmounted slides and with an optical system as in the case of drum 4, saiddrum 109 is inserted and retained on keyed shaft 36 identically to themanner in which drum 4 is inserted and retained. The scanning mechanismused for recording and reproducing sound track 97 and return trace 98 isidentical to the scanning mechanism used in conjunction with drum 4excepting that this scanning mechanism is displaced 90 degrees, andoriented in a plane orthogonal to the plane of orientation when used inconjunction with drum 4, so that sound track 97 is recorded orreproduced 90 degrees or 5 slides away from the particular slide beingprojected and on the surface containing ventilation holes 39 with whichthe said sound track 97 is associated. Also, each of the sound tracks97, and return traces 98 which return the recordreproduce head assembly17 and consequently the recordreproduce head 64 to its initial position97a, are recorded on and reproduced from the magnetic oxide coatedsurface of drum 109 in which ventilation holes 39 are located. FIG. 8illustrates the relationship of the sound track scanning mechanism withrespect to drum 109, and shows the normal or pre-operative position ofrecordreproduce head assembly 17 directly after drum 109 is insertedinto the projector, and also shows in phantom the position of assembly17 immediately preceding the scan of sound track 97, therecord-reproduce head 64 being positioned at point 97a, and when thefirst slide inserted in window 52a is automatically injected, controlrelay 66 is automatically operated starting the scan cycle.

When sound and slide retainer disk 106 is used, the sound track scannermechanism is oriented as in the case of drum 109 excepting thatrecord-reproduce head 64 is 180 degrees inverted, the magnetic oxidecoating being on the undersurface of said disk 106, said disk 106 beingin cooperative relationship with head 64 when said disk 106 is loaded inthe projector in the direction indicated by arrow 116, and identicallyto drum 109, shaft 36 extends through center of disk 106, said diskseating itself on bushing 37. A portion of said disk 106 retainingmounted slides 57 inserted through slots 107 are held in windows 52athrough 52f of said disk 106, and one of said windows, namely 5223 ispositioned in slot 108 of the optical assembly 112. Said assembly 112 iscomprised of projection lamp 113 which illuminates slide 57 throughwindow 522 and projects slide 57 image on to mirror 114, and isreflected by mirror 114 into lens assembly 115 which projects the imagereflected by mirror 114 through said lens assembly 115 on to an externalviewing screen. In programming the plural number of slides 57 situatedand held in windows 52a through 52!, each of the said plural number ofslides is successively and sequentially illuminated as the diskretaining said slides in said windows 52a through 52t is rotated througha 360 degree rotation. Inasmuch as spring tension of spring 19 will keeprecordreproduce head assembly 17 in tension so that head 64 is incooperative relationship with the underside of disk 106, no solenoidretraction mechanism is needed for this con- 8 figuration; however, Whendisk 106 is removed, limit travel stop 110 is necessary and used inorder to prevent upward travel of record-reproduce head assembly 17 dueto tension of spring 19 on said record-reproduce head assembly 17.

ELECTRICAL RELATIONSHIP Referring to FIG. 7, direct current power means95 is electrically connected by means of wire to stationary contact 79of slide selector push button 77 and then to movable contact 42 ofinjection cycle microswitch 41 and then to stationary contact 48 ofstart relay enable microswitch 45 and then to movable contact 122 ofsolenoid deenergizer microswitch 121 as well as to movable contact 72 ofcontrol relay 66 and to movable contact 27 of automatic programmingactuator microswitch 26. Movable contact 72 is also electricallyconnected by means of wire to movable contact 32 of control scannermotor stop microswitch 31. Direct current power means 95 is alsoelectrically connected by means of Wire to modulator 93 to serve as apower means for said modulator 93 and to amplifier 94 to serve as apower means for said amplifier 94. Common power and signal return means96 is electrically connected by means of wire to return side of slideselection drive motor 35, to return side of coil 67 of control relay 66,to return side of solenoid coil 49, to return side of sound trackscanner drive motor 6, to return side of record-reproduce head 64, toreturn side of loudspeaker 91, to return side of microphone 92, toreturn side of modulator 93, and to return side of amplifier 94.Stationary contact of slide selector push button 77 is electricallyconnected by means of wire to stationary contact 44 of injector cyclemicroswitch 41 and to staationary contact 104 of program terminationmicroswitch 101. Contact 44 of injection cycle microswitch 41 iselectrically connected by means of wire to the input side of motor 35.Movable contact 75 of automatic programming switch 74 is electricallyconnected by means of wire to movable contact 102 of program terminationmicroswitch 101. Movable contact 46 of start relay enable microswitch 45is electrically connected by means of Wire to the input side of coil 67of control relay 66 and also to stationary contact 69 of control relay66. Movable contact 68 of control relay 66 is electrically connected bymeans of wire to stationary contact 29 of automatic programming actuatormicroswitch 26. Stationary contact 123 of solenoid deenergizermicroswitch 121 is electrically connected by means of wire to the inputside of coil of solenoid 49. Stationary contact 73 of control relay 66is electrically connected by means of wire to the input side of soundtrack scanner drive motor 6. Movable contact 72 of control relay 66 iselectrically connected by means of Wire to movable contact 32 of controlscanner motor stop microswitch 31. Stationary contact 73 of controlrelay 66 is electrically connected by means of wire to stationarycontact 34 of control scanner motor stop microswitch 31. Stationarycontact 76 of automatic programming switch 74 is electrically connectedby means of wire to stationary contact 30 of automatic programmingactuator microswitch 26. Output of modulator 93 is electricallyconnected by means of wire to stationary contact 83 of record-reproducemode selector switch 81. Movable contact 82 of record-reproduce modeselector switch 81 is electrically connected by means of wire to theinput side of record-reproduce head 64 and to stationary contact 86 ofrecord-reproduce mode selector switch 81. Stationary contact 84 iselectrically connected by means of wire to stationary contact 90, bothof the same record-reproduce mode selector switch 81. Movable contact 88of record-reproduce mode selector switch 81 is electrically connected bymeans of Wire to the signal input side of amplifier 94. The signaloutput side of amplifier 94 is electrically connected by means of wireto movable contact 85 of record-reproduce mode selector switch 81.Stationary contact 87 of recordreproduce mode selector switch 81 iselectrically connected by means of wire to the signal input side of loudspeaker 91. Stationary contact 89 of record-reproduce mode selectorswitch 81 is electrically connected by means of wire to the signal inputside of microphone 92.

VISUAL INFORMATION AND SOUND TRACK RELATIONSHIP Referring to FIGS. 1, 3,8 and 9, the visual information and sound track are positioned andrelated with respect to each other in three different ways which areillustrated by drum 4, drum 109, and disk 106.

In the case of drum 4, said drum 4 is seated on bushing 37 and keyedmotor shaft 36 extends through drum sleeve 38 at the axis of rotation ofsaid drum 4. Under normal or pre-operative mode, when drum 4 is insertedinto the projector and installed on the aforementioned shaft 36, Window52t or the 20th window is aligned with optical assembly 2. Automaticclockwise rotation of drum 4 when push button 77 is momentarily manuallydepressed, positions said drum 4 so that window 52a (the 1st window) isaligned with optical assembly 2. Subsequent manual operation of pushbutton 77 will inject slides and accompanying sound tracks in sequenceand, after switch 74 had been manually operated so that contacts 75 and76 cooperate with each other, enables automatic sequential programmingof the remaining 2nd through the 20th windows, corresponding to windows52b through'52t as hereinabove described. In drum 4, sound tracks 97 andreturn traces 98 will be located on surfaces 53 which are substantiallyin the same planes and positioned directly above the planes of thewindows 52a to 522. These individual sound tracks 97 and return traces98 are associated with each of the said windows 52a through 522 in whichvisual information slides or film strip frames are positioned andtherein aligned.

In the case of drum 109, the insertion and seating of said drum 109 inthe projector and the 20 windows, 52a through 521, are identical to thatof drum 4 as above described. The sound tracks 97 and return traces 98are identical in pattern and character to that of the sound tracks andreturn traces of drum 4, but the location of each of the planes of the20 sound tracks and return traces will be orthogonal to any and all ofthe planes of windows 52a through 52t, and each sound track and returntrace will be displaced 90 degrees with respect to its correspondingvisual information slide or film strip frame.

In the case of disk 106, the insertion of said disk 106 into theprojector is similar to that of drum 4, except that the periphery ofdisk 106 in which window 52t is located and is an integral part of disk106, is also inserted into slot 108 of optical assembly 112 when saiddisk 106 is initially positioned and inserted into the projector. Thewindows 52a through 52t retaining mounted slides 57 or frames from filmstrip 60, are located at the outer periphery of disk 106, and aregenerally positioned in the same plane as the plane of disk 106. Thesound tracks corresponding to each of the windows retaining visualinformation are substantially in the same plane as each of the saidwindows 52a through 52f, and are located on the undersurface of saiddisk 106. As in the case of drum 109, said sound tracks 97 and returntraces 98 are displaced 90 degrees with respect to the particular slideor film strip frame associated therewith. Said sound tracks 97 andreturn traces 98 are positioned between the inner edges of windows 52athrough 52! which edges are nearest to shaft 36 and thereby causing saidsound tracks 97 and return traces 98 to encircle said shaft 36.

MECHANICAL SCANNING OF SOUND TRACK AND RETURN TRACE Referring to FIGS.6a through 6h, which schematically depict several positions of thecomponents of the mechanical scanner, and referring to FIG. 3, andstarting with the initial position at the location where recording orreproducing of the sound track occurs, FIG. 6a shows therecord-reproduce head assembly 17 and consequently the record-reproducehead 64 positioned at point 97a of sound track 97, gear 10, cam 23, andgear 9 at their respective initial or zero degree positions, and pitmanarms 12 and 13 forming a 180 degree angle with respect to each other.When motor 6 is automatically electrically energized thereby driving thescanner mechanism to the position as shown in FIG. 6b, therecord-reproduce head assembly 17 and consequently the record-reproducehead 64 will be positioned at point 97b of sound track 97, gear 10 andcam 23 will be displaced 30 degrees with respect to the initial positionof cam 23, and gear 9 being onethird the diameter of gear 10 will bedisplaced degrees, and pitman arms 12 and 13 will form approximately a60 degree angle with respect to each other. When motor 6 is furtherautomatically energized so that the scanner mechanisms is positioned asshown in FIG. 60, the recordreproduce head assembly 17 and consequentlythe recordreproduce head 64 is positioned at point 970 of sound track97, gear 10 and cam 23 are displaced 60 degrees with respect to theinitial position of cam 23, and gear 9 is rotated 180 degrees withrespect to its initial position, and pitman arms 12 and 13 overlap eachother. When motor 6 is further automatically energized so that thescanner mechanism is as shown in FIG. 6d, the recordreproduce headassembly 17 and consequently the recordreproduce head 64 is positionedat point 97d of sound track 97, gear 10 and cam 23 will be displaceddegrees with respect to the initial position of cam 23, gear 9' will bedisplaced 360 degrees with respect to its initial position, and pitmanarms 12 and 13 will form a 180 degree angle with respect to each other.When motor 6 is further automatically activated so that the scannermechanism is as shown in FIG. 6e, the recordreproduce head assembly 17and consequently the recordreproduce head 64 is positioned at point 976of sound track 97, gear 10 and cam 23 will be displaced 180 degrees withrespect to the initial position of cam 23, gear 9 will be displaced 540degrees with repect to its initial position, and pitman arms 12 and 13will overlap each other. When motor 6 is further automatically activatedso that the scanner mechanism is as shown in FIG. 6 the record-reproducehead assembly 17 and consequently the record-reproduce head 64 ispositioned at point 97f of sound track 97, gear 10 and cam 23 will bedisplaced 240 degrees with respect to the initial position of cam 23,gear 9 will be displaced 720 degrees with respect to its initialposition, and pitman arms 12 and 13 will form a 180 degree angle withrespect to each other. When motor 6 is further automatically activatedso that the scanner mechanism is as shown in FIG. 6g, therecord-reproduce head assembly 17 and consequently the record-reproducehead 64 is positioned at point 97g of sound track '97, gear 10 and cam23 will be displaced 300 degrees with respect to the initial position ofcam 23, gear 9 will be displaced 900 degrees with respect to its initialposition, and pitman arms 12 and 13 Will overlap each other. When motor6 is further automatically activated so that the scanner mechanism is asshown in FIG. 6h, the record-reproduce head assembly and consequentlythe record-reproduce head 64 is positioned at point 97h of sound track97, gear 10 and cam 23 will be displaced 355 degrees with respect to theinitial position of cam 23, gear 9 will be displaced 1065 degrees withrespect to its initial position, and pitman arms 12 and 13 will bedisplaced approximately degrees thereby forming an angle of 160 degreeswith respect to each other. Further automatic activation of motor 6 willcause the record-reproduce head assembly 17 and consequently therecord-reproduce head 64 to be returned to its starting position 97a ofsound track 97, following the path described by return trace 98, atwhich point the scanner 1 1 motor 6 and the mechanism which it driveswill be automatically stopped. Cam 23 and gear 10 will have beenreturned to their initial locations or positions having completed 360degrees of rotation, and gear 9 will have been displaced or rotated 1080degrees.

Substantially three full cycles of the sound track were completedbetween points 97a and 97h of sound track 97, by the scanner mechanism,the last degrees of cam 23 rotation being utilized for the return trace98. If it is desired to increase the number of cycles to 4 cycles, theratio of gear to gear 9 is changed to 4 to 1. If 5 cycles are desired,then the gear ratio of gear 10 to gear 9 is changed to 5 to 1, and soon. It is therefore seen that the gear ratio of gear 10 to gear 9 isdirectly proportional to the number of scan cycles. The length of anindividual segment of the trace such as between points 97a and 97c, isdirectly proportional to the difference in length between pitman arm 13and pitman arm 12 as evidenced in FIG. 6c where the two pitman arms 12and 13 are shown overlapped. Therefore, the criteria of the sound tracklength and the number of cycles per sound track is established for thevarious combinations desired and for the recordreproduce time required.In the illustrations FIGS. 6a through 6h approximately 6 inches of soundtrack is illustrated, and at a linear scan rate of one-half inch persecond, 12 seconds or record-reproduce time is possible. Longer playingtime however is accomplished by either lengthening the pitman armsand/or changing the gear ratios as hereinabove described. Pivotingaction of the scanner members 12, 13, and 15- are as described elsewherein this specification. Positive following action of member 15 retainingroller 16 affixed thereto and following the contour of cam 23 isaccomplished as said cam 23 is automatically rotated, due to fact thatspring 54 pressing against member 15 thereby causing roller 16 to pressagainst the contour of cam 23. Cam 23, gear 10, each have keyways andare mechanically affixed on keyed shaft 11, and gear 9 has a keyway andits mechanically affixed on keyed shaft 8.

Although the mechanical scanner describes an oscillatory or zig-zagsound track pattern for the record-reproduce head assembly 17 andconsequently the recordreproduce head 64 follows said sound track 97,and then returns the record-reproduce head assembly 17 and hence therecord-reproduce head 64 to its predetermined start position 97a fromoscillatory scan termination point 9711 along path or trace 98, the typeor shape of sound track may be predetermined by the placement and sizingof the components comprising the mechanical sound track scanner so thatany shape sound track may be thereby achieved.

PRE-OPERATIVE (NORMAL) MODE Referring to FIGS. 1, 2, 3, 7, 8 and 9,solenoid 49 is utilized in conjunction with the configurations using 1drums 4 or 109. In this mode, electrical energy is applied to solenoid49 through cooperating contacts 122 and 123 of solenoid deenergizermicroswitch 121, and said solenoid armature 50 is retracted, therebyretracting extension 51 which causes record-reproduce head assembly 17to be retracted preventing cooperation of record-reproduce head 64 withsurface 53 of drum 4, or prevents recordreproduce head 64 fromcooperating with the surface containing ventilating holes 39 of drum109, When said drum 109 is used. When disk 106 is used, no solenoid isneeded inasmuch as head 64 always cooperates with the magneticrecord-reproduce undersurface of said disk 106 as soon as said disk 106is loaded into projector as shown by direction arrow 116, and positionedon shaft 36. Either drum 4, drum 10-9, or disk 106 when loaded on shaft36 are positioned on the 20th or last slide or visual information framein window 522. This is so arranged in order that upon activation of therecord or reproduce cycle by manually depressing push button 77 so thatmovable contractor 78 will cooperate with stationary contacts 79 and toenable direct current power to be applied to motor 35 so that shaft 36will rotate in a clockwise direction and thereby rotate drums 4 or 109or disk 106, so that the first slide or visual information frame inwindow 52a is directly aligned with either optical assembly 2 or opticalassembly 112 as the case might be, and the corresponding sound track 97is in a position to be scanned by the mechanical scanner hereinabovedescribed. Follower roller 43 therefore initially cooperates with thehigh portion of cam 40 corresponding to the 20th or last slide or visualinformation frame located in window 52!, follower roller 47 initiallycooperates with the 20th low portion of said cam 40, and follower roller103 cooperates with extension arm 99, and follower roller 124 cooperateswith extension arm 119, so that upon electrical activation of motor 35,the follower rollers 43 and 47 will be auto matically repositioned uponthe first high and first low portion of cam 40 corresponding with thefirst slide posi tion, window 52a, drum 4 or 109 or disk 106 will beautomatically positioned so that the first slide or film strip frame isaligned with its particular optical assembly ready for projection ofsaid slide or film strip frame, and the roller 103 will cease tocooperate with extension arm 99 to enable direct current power to besupplied to automatic programming switch 74 by virtue of continuouscoopera tion of contacts 102 and 104 of program termination microswitch101 for the complete duration of sequential programming of slides 1through 20, corresponding and retained in windows 52a through 52t.Follower roller 124 will cease to cooperate with extension arm 119 toremove direct current power from solenoid 49 by virtue of contacts 122and 123 of solenoid deenergizer microswitch 121 ceasing to cooperatewith each other for the complete duration of sequential programming ofslides 1 through 20, corresponding and retained in windows 52a through521. Follower roller 33 of control scanner motor stop microswitch 31,cooperates normally with the high portion of cam 24 preventing contacts32 and 34 from cooperating with each other, while follower roller 28 ofautomatic programming actuator microswitch 26, positioned on the lowportion of cam 24, maintains contacts 27 and 29 of microswitch 26 in acooperative relationship and prevents contacts 27 and 30 of saidmicroswitch 26 from cooperating with each other until 355 degrees ofclockwise rotation of said cam 24 has been completed by virtue of motor6 being activated for the purpose of recording or reproducing soundtrack 97 and returning scanner along return trace 98 to its initialstart position 97a.

Also in the pre-operative mode, contacts 42 and 44 of microswitch 41will not cooperate with each other, c0ntacts 46 and 48 of microswitch 45will not cooperate with each other, contacts 102 and 104- of microswitch101 will not cooperate with each other, contacts 75 and 76 of switch 74will not cooperate with each other, contacts 79 and 80 will notcooperate with contactor 78 of push button 77, contacts 68 and '69 ofrelay 66 will not cooperate with each other, contacts 122 and 123 ofsolenoid deenergizing microswitch 121 will cooperate with each otherkeeping solenoid 49 electrically energized, and contacts 72 and 73 ofrelay 66 will not cooperate with each other, preventing the applicationof direct current power to motor 6 and hence the rotation of thearmature of motor 6 and driveshaft 8-, and the driving of the scanningmechanism thereby.

RECORD OR REPRODUCE MODE Referring to FIG. 7, in either thepre-operative mode or the operative mode, there will be a record mode aswell as a reproduce mode governed by the position of therecord-reproduce switch 81. FIG. 7 illustrates the recordreproduceswitch 81, schematically in the record position, the opposite positionof the three movable contacts 83, 85, and 88 of said switch 81 to thoseshown in FIG. 7 will therefore be the reproduce position of switch 81.In the record position, contact 83 cooperates with contact 82 therebyelectrically connecting the output of modulator 93 to therecord-reproduce head 64. Contacts 85 and 86 cooperate with each otherthereby also electrically connecting the output of amplifier 94 to therecord-reproduce head 64. Contacts 88 and 89 cooperate with each otherthereby connecting the output of microphone 92 to the input of amplifier94 thus completing the record capabilities of the combinationmicrophone, amplifier, modulator (high frequency), and record-reproducehead, when relative motion of head 64 cooperating with recording surfaceoccurs, thereby scanning sound track 97. In the reproduce position,contact 82 cooperates with contact 84 thereby removing modulator 93 andconnecting record-reproduce head 64 to the input of amplifier 94 byvirtue of cooperation of contacts 88 and 90 also disconnectingmicrophone 92, and contacts 85 and 87 cooperate with each other therebyconnecting loud speaker 91 to the output of amplifier 94, thuscompleting the reproduce capabilities of the combinationrecord-reproduce head, amplifier, and loud speaker, when relative motionof record-reproduce head 64 with respect to the sound track 97 occurs,said track 97 located on the magnetic oxide surface of either drum or ofthe disk.

It should be noted that motor 35 is normally a geared down motor so thatrotational speed of shaft 36 is comparatively slow. This characteristicallows reasonable injection speeds of slides as well as permitting rapidstopping of motor 35 when power is removed therefrom upon rotation ofcam 40 from the 20th to the first high portion of said cam 40, followerroller 43 cooperating with the contour of mm 40, and similarly from thefirst high portion to the second high portion until all slides have beeninjected and the 20th slide is again in normal position. Extension arm119 will be moved due to rotation of shaft of motor 35, thereby causingcontacts 122 and 123 of microswitch 121 to cease to cooperate with eachother, deenergizing solenoid 49 and releasing record-reproduce assembly17 so that record-reproduce head 64 cooperates with recording surface 53at point 97aon the sound track, when drum 4 is used, and with similarpoints 97a when either drum 109 or disk 106 is used. Follower roller 47of microswitch 45 will cause microswitch 45 to activate relay 66 whichwill cause contacts 72 and 73 to cooperate with each other, causingsound track scanner drive motor 6 to be activated. However, motor 6 alsobeing a geared down motor to permit relatively slow scanning action ofsound track 97, will be slow in starting rotation of its shaft 8. Shafts8 and 36 will be rotated at substantially the same speed. Therefore,activation of control relay 66 which automatically starts motor 6 willnot occur for approximately 15 degrees of cam 40 rotation. This timedelay will permit record-reproduce head 64 to be positioned on therecord-reproduce surface with approximately 12 degrees of cam 40rotation time to spare prior to record or reproduce action, when drum 4or drum 109 is used. When disk 106 is used, there being no solenoidinvolved, 15 degrees of cam 40 rotation time will be available in termsof time delay prior to record or reproduce action.

OPERATIVE MODES AND AUTOMATIC PROGRAMMING Referring to FIGS. 1, 2, 3, 4,5, 6, 7, 8 and 9, either drum 4, drum 109, or disk 106 is injected intothe projector in a keyway through which keyed shaft 36 extends, so thateither the said drums or disk is positioned at the same location,aligning the 20th slide with the optical projection system, and pushbutton 77 is manually momentarily depressed so that movable contactor 78cooperates momentarily with contactors 79 and 80, and switch 74 is notmanually operated so that contacts 75 and 76 do not cooperate with eachother, and direct current power is applied to motor 35 from power means95 and 96, electrically energizing motor 35 and causing shaft 36 torotate cam 40, thereby causing follower 43 mechanically afiixed tomovable contactor 42 to move from the 14 20th high portion of cam 40 tothe 20th low portion of said cam 40, thereby causing contacts 42 and 44to cooperate with each other and maintain direct current power to motor35 even after the push button 77 is no longer manually depressed, untilcam 40 is automatically rotated 18 degrees by shaft 36 of motor 35, sothat follower 43 comes to rest on the next-in-clockwise sequence orfirst high portion of said cam 40. Simultaneously, follower 47positioned cooperatively with the 20th low portion of cam 40 will followthe 20th low portion of said cam 40 until the first high portion of cam40 is encountered, at which time contactor 46 mechanically attached tofollower 47, will be moved by the first high portion of cam 40 to causecontact 46 to cooperate with contact 48, thereby momentarily causingdirect current power to be applied by power means and 96 to coil 67 ofcontrol relay 66, causing relay 66 to be energized and activated.Holding contacts 68 and 69 will cooperate with each other therebyelectrically locking relay 66 into its energized position by virtue ofpower being delivered to relay coil 67 through cooperating contacts 68and 69. Follower roller 47 will simultaneously be positioned on thefirst low portion of cam 40 due to completion of 18 degrees of cam 40rotation, thereby causing contacts 46 and 48 to cease to cooperate. Atthe same time, slide one aligned within window 520! is aligned with theoptical projection system and motor 35 had driven drum 4 or drum 109 ordisk 106 an angular distance of 18 degrees from its starting position orfrom window 52t to window 52a, and said motor 35 is automaticallystopped. At the same time extension arm 99 had ceased to cooperate withfollower roller 103, causing contacts 102 and 104 of program terminationmicroswitch 101 to cooperate with each other and remaining in thiscooperative relationship until cam 40 had returned to its initialpre-operative position after 20 sound tracks had been scanned which areassociated with each of 20 slides in windows 52a through 52t which hadbeen projected. Automatic activation of microswitch 101 so that contacts102 and 104 cooperate with each other, is only important when automaticprogramming switch 74 is manually operated; this enables sequentialoperation of slides and accompanying sound tracks automatically, untilall 20 slides and associated 20 sound tracks had been utilized. Forsingle slide operation, that is injecting each slide individually bymanuall operating the push button 77, microswitch 101 activation is notrequired. Extension arm 119 ceasing to cooperate with follower roller124 upon activation of motor 35, will cause cooperating contacts 122 and123 of microswitch 121 to cease to cooperate, thereby deenergizingsolenoid 49 which will cause head 64 to be placed in cooperativerelationship with sound track 97 at point 9711 by virtue of extension 51releasing record-reproduce head assembly 17, and tension spring 19causing said assembly 17 to be pivoted about axis of pivot pin 18.Simultaneously with the activation of relay 66 due to cooperation ofcontacts 46 and 48 of microswitch 45 initiated by cooperation of roller47 with the first high portion of cam 40, relay coil 67 is energized,and holding contacts 68 and 69 cooperate with each other and hold relay66 energized and by cooperative action of contacts 72 and 73, motor 6will be energized and driveshaft 8 will be rotated, thereby startingscanning action of the mechanical scanner as hereinabove described. Whenshaft 8 driving cam 24 as well as cam 23 starts to rotate due torotation of motor 6 armature which is initiated by cooperative action ofcontacts 72 and 73 thereby applying direct current power from powermeans 95 and 96 to said motor 6, and cam 24 starts to rotate in samedirection as cam 23 thereby causing follower roller 33 mechanicallyaflixed to movable contactor 32 of microswitch 31 to be moved from itsposition on the high portion of cam 24 to the low portion of cam 24thereby causing contacts 32 and 34 of microswitch 31 to cooperate witheach other applying direct current power to said motor terminals until360 degrees or the high portion of cam 24 has again 15 established acooperative relationship with roller 33. Since the rotation time of cam24 is identical to the scanning time of sound track 97 and the time ofthe return trace 98, it is seen that at 355 degrees of cam 24 rotationreturn trace 98 will begin, terminating at 360 degrees of cam 24rotation or otherwise referred to as the initial pre-operative positionof said cam 24. At 355 degrees completion of cam 24 rotation, analogousto the completion of the scanner action, follower roller 28 which ismechanically affixed to movable contact 27, is repositioned from the lowportion of cam 24 to the high portion of cam 24. When the high portionof cam 24 momentarily cooperates wtih roller 28, movable contact 27 ismoved away from a cooperative relationship with contact 29, therebydisconnecting direct current power from contact 29 and momentarilycausing cooperation of contact 27 with contact 30 which causes directcurrent power to be applied to contact 76 of switch 74. The ceasing ofcooperation of contacts 27 and 29, removes direct current power fromrelay coil 67 by interrupting power to the holding contacts 68 and 69thereby causing relay 66 to be deenergized, and causing contacts 72 and73 to cease cooperating with each other. However, inasmuch as contacts32 and 34 of microswitch 31 are still in cooperative relationship witheach other, direct current power will continue to be applied to motor 6until the high portion of cam 24 again cooperates with roller 33,thereby completing 360 degrees of cam 24 rotation, causing contacts 32and 34 to cease cooperating with each other, and removing direct currentpower from motor 6, thus stopping rotation of armature of said motor 6.Simultaneously with the record-reproduce cycle termination action,contacts 27 and 29 will again cooperate with each other, enabling directcurrent power to again be applied to holding contact 68 of control relay66 for readying the next-in-sequence slid and record-reproduce soundtrack combination for injection and repetition of recordreproducerecycling action.

It should be remembered that contacts 27 and 30 cooperated with eachother at 355 degrees of cam 24 rotation, and when automatic programmingswitch 74 had been previously manually operated so that contacts 75 and76 cooperated with each other, direct current power applied throughcooperating contacts 27 and 30, and cooperating contacts 102 and 104,caused power to be applied to motor 35 which automatically injected thenextin-sequence slide and repeated the entire record or reproduce cycle.This action was made possible by choosing motors 35 and 6 and theirspeed reducing gears internal to said motors in such a manner so thatboth motor shafts are automatically rotated at substantially the samespeed, and at 355 degrees of cam 24 rotation only degrees of cam 24rotation remains during which time the retrace path 98 is accomplished.Whereas motor 35 becomes operative with 5 degrees of cam 24 rotationremaining, there nevertheless is a 15 degree lag between the moment ofcooperation of contacts 27 and 30, and the moment of cooperation ofcontacts 46 and 48 which upon cooperation energize control relay 66.There is a net differential of degrees of cam 40 rotation betweencessation of motor 6 armature rotation and resumption of rotation ofsaid armature during the automatic programming of slides and relatedsound tracks. This differential permits ample time for the slideinjection action to terminate prior to the start of sound track scanningaction, automatically. When automatic and sequential slide programmingis not desired, that is, the automatic programming switch 74 is not used(the contacts 75 and 76 are not in a cooperative relationship), the 10said degrees of cam 40 differential is not required inasmuch as no powermay be automatically applied to motor 35 upon completion of cam 24rotation, and the scan cycle will be terminated. In order to inject thenext-in-sequence slide and repeat the scan cycle, push button 77 willagain therefore have to be momentarily manually depressed.

16 SPOKE-WHEEL DRUM CONFIGURATION Referring to FIGS. 10, 11, 12, 13, 14and 15, detailing this configuration, base 144 has mechanically affixedthereto the controller mechanism comprising injection cycle motor 125,injection cycle cam 126 and cooperating microswitches 41 and 45, cam 127which is in cooperation with the follower end of elevator lift armassembly 129, drum advance-reverse cam 128 and its cooperatingmicroswitch 131. Assembly 129 is mounted on pin 147 which is pivotablysuspended between two brackets 146 which are mounted on base 144.Tension spring 130, the ends of which are mechanically affixed toassembly arm 129 and base 144, urges the follower end of assembly arm129 against the contour of cam 127. Scanner mounting plate ismechanically affixed by means of 'brackets (not shown) to base 144 andhas mounted thereon within compartment 181 mechanical components of thescanner as hereinabove described, and the scanner drive and controlcomponents such as relay 66, motor 6, cam 24 and its cooperatingmicroswitches 26 and 31, these components having already beenhereinabove described in connection with the other projectorconfigurations. Drum support base 148 is mechanically mounted to base144 by means of brackets (not shown). Base 148 is used for mountingthereon drum reverse solenoid 139, drum advance solenoid 140, slidesupport plate engagement pin 149. Bases 148 and 144 have respectivelybearings 143 therein mechanically affixed for support in these bearingsdrum retaining shaft 141. Shaft 141 has key 142 as an integral portionthereof for proper orientation of spoke-wheel drum 159. Shaft 141 hasmounted thereon automatic sequence arm 178'. This arm normally (whendrum is at start or or zero location) is in cooperation with microswitchfollower roller 103 of microswitch 101 so that when switch 74 is closedcausing cooperation between contacts 75 and 76 the automatic sequencingof slides will be possible on scan completion of the sound trackassociated with the slide being projected as hereinabove described inconjunction with the other projector configurations. Also mounted onbase 145 is reflector mirror 176, projector lamp 177 and support meansfor optical assembly (not shown). Base 145 also has provisions forsupporting slide lift elevator 152 which elevator is used tosupport thebottom edge of slide means 150. Slide means 150 is coated on one surfacewith magnetic material which acts as the recording-reproducing surfacewith which record-reproduce head 64, being mounted on member 17 of thescanner and being electrically connected to the audio system ashereinabove described in connection with the other pro jectorconfigurations. Slide lift elevator 152 has a socket at its bottom andits center for engagement with a ball end of the vertical portion ofelevator arm assembly 129, thereby forming a ball joint for pivoting andcompensating omni-directional motion of the vertical portion of the liftarm assembly 129. The vertical portion is mechanically hinged to thehorizontal portion of the lift arm assembly "by means of hinge 179 so asto enable upward motion of said vertical portion when the horizontalportion is being pivotably driven by means of cam 127. Aperture 182 inplate 145 permits the rise of vertical portion of lift arm assembly 129so as to lift slide lift elevator 152 stopping in-line with slot 167 ofslide support plate 162, injecting slide means 150 into a compartment ofthe spoke-wheel drum formed by panels 168 and which returns anotherslide on elevator 152 after angular rotation of drum 159 to thenext-in-line slide position. Slide means 150 has mounted 35 millimeterslide 151 inserted and held in the grooves provided therefor. Anotherslide frame having a recording surface as displayed in US. Pat. No.3,350,983, issued Nov. 7, 1967 to the same inventive entity, may be usedinstead of slide 150. In the latter case, arm 17 bearingrecord-reproduce head 64 would have to be physically repositioned.Fingers 1'53 and 154 of spring steel material are used to hold slideagainst a vertical portion of member 145 and finger 158, also of springsteel is used to hold slide 150 at one edge thereof, the other edgebeing held against stop member 156. Finger 154 is also used to retractmember 17 of the scanner assembly, thereby retracting head 64 whenelevator 152. rises. Fingers 158, 153 and 154 are retracted whenelevator 152 rises by means of normal cooperation of these fingers withthe edges of elevator 152 thereby releasing the finger pressures on theslide means u-pon injection motion of the slide into the spoke-wheeldrum and upon gravity drop of the next slide in the projection positionon downward motion of elevator 152. Case 174 is the outer case of theprojector and is mechanically afiixed to base 144. Outer casing 174 alsohas an opening to enable insertion of lens assembly 160 and has rise 175which forms a circular depression into which spokewheel drum 159 ispositioned. Drum 159 has drum rotate studs 173 which normally rest onthe surface of drum support base 148. Upon seating and positioning drum159, shaft 141 is injected into aperture 171 and key 142 is inserted ingroove 172 and pin 149 is injected into slide support plate havingaperture 163 to enable plate 162 to be so positioned as to have slot 167align with slot 164. Plate 162 is mechanically supported between anundercut of center support member 161 and plate 165, and plate 165 is inturn mechanically supported by means of pins or screws 166 which insertthrough plate 165 into center support member 161 of drum 159. Plate 162therefore, is stationary as the drum 159 itself is being rotated uponimpulse cooperation of solenoid armatures of solenoids 140 or 139' withany of studs 173. Solenoids 140 or 131 will be used depending uponwhether advance or reverse of drum 159 is desired and will be dependentupon which elements of switch 135 cooperate. When slide means 150 is inposition resting on elevator 152 and ready for record-reproduce andproject action, fingers 158, 153 and 154 extending through and pivotedin slots of plate 145 are held against said slide means 150* due totension exerted by springs 155. All fingers extend through base 145 havetheir extended ends each connected to one of springs 155, the other endsof springs 155 being mechanically afiixed to base 145.

Spoke-wheel drum 159' is molded out of plastic material for economy andis shown as having eighteen compartments for simplicity of illustration.These compartments are formed by separator panels 168 which are moldablyatfixed to the body of the drum and to center support member 161. Slidesupport plate 162 being mounted between an undercut of member 161 andsupport plate 165 is fixedly held in position by means of pin 149inserted in aperture 163 so that upon seating of drum 159 on base 148wherein studs 173 cooperate with the outer surface of base 148, the drumis free to rotate about its axis defined by the center and length ofgroove 172 upon solenoidal action of solenoids 139 or 140. Upon seatingof drum 159, key 142 engages groove 172 so that the compartment havingplug 157 therein is positioned at the zero or start position. Plug 157prevents the loading of that related compartment with a slide means 150so that upon rotation of drum 159 elevator 152 will not have any slidemeans thereon and will be free to accept any slide means from anycompartment either in the forward or reverse direction of drum rotation.Actually this drum may practically have one-hundred compartments forslide means. The drum compartments are loaded with slide meanspositioned in the same direction with the visual portions 151 at thecenter, adjacent the center support member 161 and resting upon slidesupport plate 162. To prevent slide means from dropping out of the drum,slide retaining plate 169 is held by groove 170 of member 161. Uponpositioning drum 159 'on base 148, aper- 18 tures 164 and 167 and thecompartment with plug 157 are aligned at the zero position.

Direct current power input means is electrically connected to stationarycontact 79 of push button 77, to movable contact 42 of microswitch 41,to stationary contact 48 of microswitch 45, to stationary contact 134 ofmicroswitch 131 and to movable contact 27 of microswitch 26. Ground andsignal return 96 is electrically connected to one end of injection cyclemotor 125, to relay coil 67, to scan motor 6, and solenoids 139 and 140.Components comprising the audio system 81, 91,- 92, 93 and 94 and theirelectrical and mechanical relationships have been hereinabove describedin conjunction with the other projector configurations and due toidentity of structure and function will not be restated here. Stationarycontact 80 of push button 77 is electrically connected to injectioncycle motor 125, to stationary contact 44 of microswitch 41, and tostationary contact 104 of microswitch 101. Movable contact 46 ofmicroswitch 45 is electrically connected to one end of coil 67 of relay66 and to stationary contact 69 of relay 66. Movable contact '68 ofrelay 66 is electrically connected to stationary contact 29' ofmicroswitch 26, said contact 29 normally cooperates with movable contact27 of microswitch 26. Stationary contact 73 is electrically connected tothe high side of motor 6 and to stationary contact 34 of microswitch 31and movable contact 72 of relay 66 is electrically connected to movablecontact 32 of microswitch 31. Stationary contact 30 of microswitch 31 iselectrically connected to stationary contact 76 of switch 74 and movablecontact 75 of switch 74 is electrically connected to movable contact 102of microswitch 101. Movable contact 133- of microswitch 131 iselectrically connected to movable contact 136 of two-position switch135. Stationary contact 137 of switch is electrically connected to theinput side of advance-drum solenoid 140 and stationary contact 138 iselectrically connected to the input side of reverse-drum solenoid 139.

The operation of the scanner which is driven by motor 6 as well as theaudio record-reproduce system need not be discussed here as both areidentical in structure and function with those used in the otherprojector configurations and hereinabove described. The differencebetween automatic sequencing of slides or sequencing slides bydepressing the push button each time the scan cycle ends resides inwhether switch 74 is open or closed. When switch 74 is open so that nocooperation of contacts 75 and 76 occurs then no power will bemomentarily available to motor 125 at the end of the scan cycle andhence there will be no injection action of the next slide. When switch74 is closed so that contacts 75 and 76 cooperate and after push button77 had been momentarily manually depressed so as to start the slideinjection cycle and rotation of drum 159, shaft 141 will be rotatedthereby causing arm 178 to be in cooperative relationship with roller103 of microswitch 101 to cause cooperation of contacts 102 and 104 andprovide an electrical path between contact 30 of microswitch 26 andinput to motor 125. Cooperation of contacts 102 and 104 will continueuntil the drum is repositioned to its zero compartment position, arm 178opening contacts 102 and 104 and preventing further rotation of drum 159until push button 77 is again manually depressed so that movable contact78 momentarily cooperates with stationary contacts 79 and 80, againproviding power to motor 125. When switch 74 is opened so that contacts75 and 76 cease cooperating, power will also not be applied throughmicroswitch 26 and the projector injecton and scan cycle will occur oneat a time, having to depress push button 77 for each slide injection andscan cycle.

Upon momentarily operating push button 77, movable contact 78cooperating with stationary contacts 79 and 80 provide power to motor125 and power to control relay 66. Motor 125 driving cams 126, 127 and128 which are mechanically affixed to the shaft of motor 125, will causeimmediate take over of rotation of motor 125 due to cooperation ofcontacts 42 and 44 of microswitch 41, caused by the slight rotation ofmotor 125 shaft by virtue of operation of push button 77 momentarily,and will upon degrees of shaft of motor 125 rotation, start movingelevator lift arm assembly 129 due to the follower end of lift armcooperating with cam 127 contour. After 40 degrees of shaft of motor 125rotation, lift 152 will rise to its top position ready to accept a slidemeans passed through slot 167 while lift 152 stays lifted until 150degrees of shaft of motor 125 rotation. In the meantime, between 50 and140 degrees of rotation of shaft of motor 125, cam 128 will causecontacts 133 and 134 to cooperate by cooperation of cam 128 withfollower roller 132 thereby allowing either solenoid 140 or 139,whichever is then energized due to position of switch 135 wherein eithercontacts 136 and 137 or contacts 136 and 138 cooperate with each otherto operate either of the solenoids, in order to cause ejection of thesolenoid armature and its cooperation with one of studs 173 therebyeither advancing or reversing drum 159 one slide means compartment sothat the bottom edge of slide means 150 in the compartment is positionedon the elevator 152. The allowance of 90 degrees for solenoid actuationand drum motion is due to the heavy mass of the drum and slow responseof the solenoid. The 10 degrees overlap in lift response after solenoidactuation occurrs, assures the proper positioning of the slide means onthe elevator prior to dropping the elevator. This occurs between 150 and180 degrees of shaft of motor 125 rotation, thereby dropping the slidemeans into the projector in alignment with the optical system. Head 64is returned to a cooperative relationship with surface of slide means150 due to elevator 152 drop action which causes finger 154 controllingthe retraction of member 17 to reposition member 17 so that head 64 isin cooperative relationship with the surface of slide means 150 andfinger 154 as well as fingers 153 and 158 are again cooperating withslide means 150, and after a pause between 180 and 350 degrees ofrotation of the shaft of motor 125 and associated cams 126, 127 and 128,at 350 degree position of motor and associated cams, cam 126 highportion will cause contacts 47 and 48 to cooperate with each otherenergizing relay coil 67 of relay 66. The functions and structures ofrelay 66, motor 6, cam 24, and related microswitches 26 and 31 beingidentical as described in the other projector configurations will not berestated here. However, after 350 degrees of motor and cam 126 rotation,the injection motor 125 will come to a stop at 360 degrees when it openscontacts 42 and 44 due to cam 126 arriving at the 360 degree position,causing these contacts to cease cooperating, and thereafter only thescan cycle will be in operation in the identical manner as hereinabovedescribed in connection with the other projector configurations. Ontermination of the scan cycle, namely motor 6 and cam 24 havingcompleted 360 degrees of rotation and when contacts 75 and 76 of switch74 are open and not cooperating with each other, the entire scanner aswell as all the control circuits will be in their normal inoperativecondition and push button 77 will have to be manually again depressedfor the next slide injection and scan operation. But if switch 74 isclosed so that contacts 75 and 76 cooperate, then upon completion of thescan cycle, another injection cycle will be automatically initiateduntil the drum 159 has been returned to its initial position, namely thecompartment with plug 157 which is aligned with aperture 167 at whichtime the projector scan and injection components as above described willagain be reset to their normal inoperative position due to automaticsequence arm 178 cooperating with follower roller 103 of microswitch101, which will cause contacts 102 and 104 to cease cooperating, therebypreventing power from being further applied to motor until push button77 is again manually momentarily depressed. It is to be specificallypointed out that FIG. 15 represents the timing of the injection cycle,and that END INJECT CYCLE at 360 degree point indicates the stoppage ofrotation of the shaft of motor 125 and not the end of the scan cycle.Scanning actually begins when motor 6 shaft begins to rotate at about355 degrees displacement of the shaft of motor 125.

It should be noted that the mechanism for injecting slide means into theprojector from the spoke-wheel drum may be all mechanical instead of theelectro-mechanical configuration displayed herein. However, it is feltthat the electro-mechanical approach permits greater simplicity inmechanical components and consequently more positive action and greaterreliability of performance.

I claim:

1. A projector that optically projects any of a plural number of slidesand provides sound relating thereto, comprising in combination:

a slide magazine having a plurality of compartments;

an individual audio information record for retention thereof in any ofsaid compartments, said audio information record having a visualinformation slide;

a record-reproduce head for recording sound on a surface of said audioinformation record or for reproducing said sound therefrom;

sound track scanning means for imparting motion to said head,comprising:

reciprocating means movable in a first horizontal direction and also ina second horizontal direction opposite to said first horizontaldirection; translation means cooperating with said reciprocating meansfor imparting motion to said reciprocating means in a vertical directionsubstantially perpendicular to the horizontal directions therebyproviding a generally oscillatory path of translation of saidreciprocating means, said head being attached to said reciprocatingmeans and moving in directions corresponding to the horizontal andvertical directions of movement of said reciprocating means, saidtranslation means also including means for returning the portion of saidreciprocating means carrying said head from a terminating location ofsaid generally oscillatory path to a predetermined starting locationthereof in a path substantially parallel and opposite to said verticaldirection; means for activating said sound track scanning means fromsaid predetermined starting location of said head with respect to saidsurface; means for deactivating said sound track scanning means uponreturn of said head to said predetermined starting location for at leastone of said plural number of slides; and

means for moving said magazine and for displacing one of saidcompartments at a time in a predetermined direction.

2. The apparatus as stated in claim 1, wherein:

said slide magazine is a drum, the compartments thereof being arrangedfor injection therein and ejection therefrom of the audio informationrecord. I

3. The apparatus as stated in claim 1, including:

means for controlling the scan time of the sound track scanning means.

4. A projector that optically projects any of a plural number of slidesand provides sound relating thereto, comprising in combination:

a rotatable slide magazine having a plurality of compartments;

an individual audio information record for retention

